Задача. Дан параллелограмм 𝐴𝐵𝐶𝐷. На стороне 𝐴𝐷 выбрана точка 𝑋 таким образом, что ∠𝑋𝐶𝐷 = ∠𝐵𝐶𝐴. Прямые 𝐶𝑋 и 𝐴𝐵 пересеклись в точке 𝑌. Точка 𝑂 центр описанной окружности треугольника 𝐴𝑋𝑌. Докажите, что прямая 𝐶𝑂 перпендикулярна прямой 𝐵𝐷.
Желаем вам получить удовольствие от выбора подарков 🎁
Задача. Дан параллелограмм 𝐴𝐵𝐶𝐷. На стороне 𝐴𝐷 выбрана точка 𝑋 таким образом, что ∠𝑋𝐶𝐷 = ∠𝐵𝐶𝐴. Прямые 𝐶𝑋 и 𝐴𝐵 пересеклись в точке 𝑌. Точка 𝑂 центр описанной окружности треугольника 𝐴𝑋𝑌. Докажите, что прямая 𝐶𝑂 перпендикулярна прямой 𝐵𝐷.
Желаем вам получить удовольствие от выбора подарков 🎁
Lastly, the web previews of t.me links have been given a new look, adding chat backgrounds and design elements from the fully-features Telegram Web client. The channel appears to be part of the broader information war that has developed following Russia's invasion of Ukraine. The Kremlin has paid Russian TikTok influencers to push propaganda, according to a Vice News investigation, while ProPublica found that fake Russian fact check videos had been viewed over a million times on Telegram. Elsewhere, version 8.6 of Telegram integrates the in-app camera option into the gallery, while a new navigation bar gives quick access to photos, files, location sharing, and more. Telegram, which does little policing of its content, has also became a hub for Russian propaganda and misinformation. Many pro-Kremlin channels have become popular, alongside accounts of journalists and other independent observers. Individual messages can be fully encrypted. But the user has to turn on that function. It's not automatic, as it is on Signal and WhatsApp.
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